So, not an empire.
Obviously..?
IRGC members were/are able to go to and operate military bases in Syria, Iraq, Lebanon, and even Yemen. If the US is an empire which I argue we are, and given China has a base in Djibouti they are too, than Iran is an empire alongside Russia, the UK, and France.
It doesn't matter if they have consent of the government, an empire is an empire. The only reason China, and the US don't like that term is because both like... many empires want to play their hand well, and have their cake and eat it too so they, and many others call it different things to avoid moral scrutiny. But I would argue that scrutiny is getting less salient as time goes on. China for example should have intervene in the civil war in Myanmar/Burma which would have given them practice for Taiwan, the US overdid it, and should have let Arab spring take care of Saddam, and the North Alliance deal with the Taliban. They also should have dealt with Cuba as soon as Putin was bogged down in Ukraine. Trump is overdoing it in Iran with a stupid ground invasion, but arguably extorting Ukraine for rare earths was a good move in the short, and median term, even if it's bad in the long term however like many realists state... we are all dead in the long term. I prefer the long-term view, but the long term view isn't popular in realism.